Question

21) Solve x2 - 13x - 30 = 0 by factoring.

Answer 1

x=15 or x=-2

Explanation:

x^2-13x-30=0

First find the multiples of 30 that will also equal to 13.

6*5=30 ,15*2=30 and 10*3=30

1. x^2-15x+2x-30=0
2. x(x-15)+2(x-15)=0
3. (x-15)(x-2)=0
4. x-15=0 or x+2=0
5. x=15 or x=-2

Answer 2

x= 15, -2!!!!!!!!!!!!!!